Methyl 8a-hydroxy-7-methoxy-5-(methoxymethoxy)-2a-(4-methoxyphenyl)-8-oxo-2-phenyl-1,2-dihydrocyclobuta[b]chromene-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
溶剂黄146   、                                                                                                  
tetramethylammonium triacetoxyborohydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以13%的产率得到methyl (1R,2S,3R,3aR,8bS)-1,8b-dihydroxy-8-methoxy-6-(methoxymethoxy)-3a-(4-methoxyphenyl)-3-phenyl-2,3-dihydro-1H-cyclopenta[b][1]benzofuran-2-carboxylate